Create springwolf-websockets-example

[stavshamir]

• Create a new submodule springwolf-websockets-example in springwolf-examples. The submodule project structure should be similar to the other example project.
• The project should have a working docker compose setup that would allow us to conveniently test the plugin after we implement it.
• We may skip creating the expected asyncapi.json file at this point.
• As the plugin is not implemented yet, the project should not include it at this point and only provide a working Spring Boot websockets project.

[timonback]

Relates to https://github.com/springwolf/springwolf-core/issues/364, https://github.com/springwolf/springwolf-core/issues/61

[timonback]

From an earlier project, I do have some example code.

But I also stumple upon websockets, which I had used together with Reactor Flux to publish data from the server and STOMP to communicate bidirectional over websocket.

The annotations listed in https://github.com/springwolf/springwolf-core/issues/24#issuecomment-1118869912 are also the ones I am aware of. Each @MessageMapping would correspond to an incoming channel without a response. Each @SendTo and @SendToUser would correspond to an outgoing channel. Both from the view of the application.

User -> Request -@MessageMapping-> application -@SendTo-> Response -> User

Both AsyncAPI bindings either provide 0 or a couple parameters to describe the initial connection string and there is currently no activity: https://github.com/asyncapi/spec/issues/787

I suggest to go with STOMP (over websocket). The plugin is called stomp-plugin and we start with basic support to auto-detect the annotations.

[timonback]

Basic example is pushed: https://github.com/springwolf/springwolf-core/tree/websockets-plugin

[github-actions[bot]]

The change is staged for release and will be part of the next release.

If you want to try and verify it in your application today, use the latest 1.X.0-SNAPSHOT build as described in our README.md > Testing SNAPSHOT version

Thank you for the report/contribution!

[github-actions[bot]]

The change is available in the latest release. 🎉

Thank you for the report/contribution and making Springwolf better!